Being a good trainer, he says, requires someone who is not absorbed by his or her own goals or achievements and who is willing to share experiences.

“Really, being a good trainer is about healing people,” Armstrong explains. “It’s about making people better, making them move better, making their life better, and being totally selfless and being of service.”

These are characteristics, he says, that have made CrossFit Founder and CEO Greg Glassman such a good coach.

To Armstrong, it’s about “having knowledge but being able to teach that to people that don’t understand.”

The CrossFit Journal is a chronicle of the empirically driven, clinically tested, and community developed CrossFit program. Our mission is to provide a venue for contributing coaches, trainers, athletes, and researchers to ponder, study, debate, and define fitness and collectively advance the art and science of optimizing human performance.